package main

import (

"flag"

"fmt"

"log"

"code.google.com/p/google-api-go-client/youtube/v3"

)

var (

message = flag.String("message", "", "Text message to post")

videoID = flag.String("videoid", "", "ID of video to post")

playlistID = flag.String("playlistid", "", "ID of playlist to post")

)

func main() {

flag.Parse()

// A bulletin must contain a message and may also contain a video or a

// playlist. You can post a message with or without an accompanying video

// or playlist, but you can't post a video and playlist at the same time.

if *message == "" {

log.Fatalf("Please provide a message.")

}

if *videoID != "" && *playlistID != "" {

log.Fatalf("You cannot post a video and a playlist at the same time.")

}

client, err := buildOAuthHTTPClient(youtube.YoutubeScope)

if err != nil {

log.Fatalf("Error building OAuth client: %v", err)

}

service, err := youtube.New(client)

if err != nil {

log.Fatalf("Error creating YouTube client: %v", err)

}

// Start making YouTube API calls.

parts := "snippet"

bulletin := &youtube.Activity{

Snippet: &youtube.ActivitySnippet{

Description: *message,

},

}

if *videoID != "" || *playlistID != "" {

parts = "snippet,contentDetails"

// The resource ID element value differs depending on

// whether a playlist or a video is being posted.

var resourceId *youtube.ResourceId

switch {

case *videoID != "":

resourceId = &youtube.ResourceId{

Kind: "youtube#video",

VideoId: *videoID,

}

case *playlistID != "":

resourceId = &youtube.ResourceId{

Kind: "youtube#playlist",

PlaylistId: *playlistID,

}

}

bulletin.ContentDetails = &youtube.ActivityContentDetails{

Bulletin: &youtube.ActivityContentDetailsBulletin{

ResourceId: resourceId,

},

}

}

call := service.Activities.Insert(parts, bulletin)

_, err = call.Do()

if err != nil {

log.Fatalf("Error making API call to post bulletin: %v", err.Error())

}

fmt.Println("The bulletin was posted to your channel.")

}